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Hi Index Lenses

Put simply, hi index lenses are prescription lenses which have been thinned down using a special surfacing process. Have you ever wondered why your lenses resemble the substance of a house brick? Well that’s because you probably have a very high prescription which will affect the amount of substance on the edge or in the middle of your lenses. If you are near-sighted and need you glasses for distance then you will find that the thicker part of you lenses will be at the edge. If you are far-sighted and require glasses for reading then the thicker part will be in the middle of your lenses.

The growing trend in wearing over-sized frame styles means that if you have a high prescription, your glasses will almost probably look cosmetically unattractive due to the thickness of your lens. You see, the larger the frame, the thicker your lenses will become. Choosing a hi index thinner lenses will remedy this problem for you.

 

Standard lens VS 1.60 hi-index

Is your prescription above +2.50 or -2.50 ?

Hi-index (1.6) - A 1.60 refractive index lens is up to 20% thinner than standard plastic lenses. These thinner lenses are generally recommended for prescriptions above plus or minus 2.50. These are currently the world’s most popular hi index lenses on the optical market, as they offer the wearer a good cosmetic result at an affordable price.

 

 

 

Is your prescription above +3.00 or -3.00 ?

Hi-index (1.67) - A 1.67 refractive index lens is up to 30% thinner than standard plastic lenses. Thinner 1.67 Aspheric Lenses are one of the thinnest and lightest plastic lenses available in the Lens range making it suitable for most of the majority of today's popular frames. These lenses are generally recommended for prescriptions above plus or minus 3.00. These lenses are suitable for rimmed, half rimmed and rimless frames.

Standard lens VS 1.67 hi-index


 

 

Standard lens VS 1.74 hi-index

Is your prescription above +5.00 or -5.00 ?

Hi-index (1.74) - A 1.74 refractive index lens is up to 45% thinner than standard plastic lenses - these hi index lenses are currently the worlds thinnest plastic lens material. These lenses are generally recommended for prescriptions above plus or minus 5.00. Here at Eyewear Glasses we are able to offer these very thin lenses to our customers at a fraction of the normal RRP.